If its just only doing it a bit occasionally but runs nice in the sections i wouldnt worry so much.

its fine at 2nd 3rd gear sections you dont notice it, its on long inclines that its most noticable,i wasnt going to jump in and buy head and insert straight of without trying like you say the cheaper option,first im going to try super unleaded see if that helps ive ordered some boyesen reeds maybe up one on pilot ,not sure what settings are at moment going to have look one night this week, think its standard

Edited April 25, 201610 yr by barryb1973

pilot doesnt help on full throttle openings im guessing a sze down in slide would help.

Expensive to try though.... what number is in there again?

Edited April 26, 201610 yr by nigel dabster

I would, like suggested before, suggest higher octane fuel, or octane booster. Easy and cheap to try.

had look tonight its got 3.5 slide 125 main 48 pilot,tried super unleaded and fitted boyesen reeds seems bit better but not perfect,looks like im going to have to buy no3 slide and try that

lift needle again check float level as well

Ive set floats allready

My bike stumbled, knocked, pinged and stuttered in the just off idle - 1/4 throttle range.  Going to a #3 slide cured most of it.  However there is still a small throttle range right near 1/4 throttle that was still giving me fits.  No matter how rich I went, I couldn't cure it.  I just checked my squish yesterday and it's at 0.7mm which I believe is the issue.  I've got some base gaskets on order and will correct that.

 

If your squish is correct, which it should be if you are the original owner and have never changed the base gasket, the #3 slide will probably cure your problem assuming your issue is in the idle - 1/4 throttle range.  

Edited May 4, 201610 yr by doc_d

fitted the no3 slide seems to have stopped knocking but now seems to surge and pop on over run more than it did which normally happens when lean but plug looks as if a little rich so ive ordered a 45 pilot (standard) as it has 48 at present fingers crossed it will be sorted

dont forget its an air screw not fuel screw adjustment, so further in is richer. I think!

fitted the no3 slide seems to have stopped knocking but now seems to surge and pop on over run more than it did which normally happens when lean but plug looks as if a little rich so ive ordered a 45 pilot (standard) as it has 48 at present fingers crossed it will be sorted

 

fitted the no3 slide seems to have stopped knocking but now seems to surge and pop on over run more than it did which normally happens when lean but plug looks as if a little rich so ive ordered a 45 pilot (standard) as it has 48 at present fingers crossed it will be sorted

 

 

Where is your air screw at?  At about 900 feet above sea level and 65 degree F with a #48 pilot and #3 slide I ran my air screw at 1.5 turns out.  I did an event last weekend with those settings on a fresh plug.  I pulled the plug after the event and it looked perfect.

 

I'm sure you know but as Nigel mentioned it's an air-screw.  So in is richer out is leaner.

Edited May 5, 201610 yr by doc_d

Had proper ride tonight had to have air screw 3 turns out just to get it to idle properly so i reckon the 45 pilot should sort it

School kids use emojis if you got anything to comment please type it nob

finally seem to be there,put the 45 pilot in no more surging and idles well with 1 1/2 turns on air/fuel srew,only pottered about outside home just need proper run now make sure thanks for all help